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+====== PP 335 ======
+**Calibre 335** (and the similar **Calibre 310**) was an automatic watch movement from [[Patek Philippe]].
+This was Patek Philippe's primary [[central rotor]] automatic watch movement from [[1980]] through [[1984]], when [[PP 315|Cal. 315 and 330]] were introduced.
+===== Info =====
+Patek Philippe has a long history in automatic watch movements, dating to [[PP 350|Cal. 350]] from the 1950's. Although these early movements were successful, they suffered from issues of durability, power reserve, and accuracy. One reason was their iconoclastic design: Cal. 350 had a [[peripheral rotor]] while [[PP 240|Cal. 240]] had a [[micro rotor]]. Patek Philippe, like [[Audemars Piguet]] and [[Vacheron Constantin]], had turned to [[Jaeger-LeCoultre]] for an automatic movement in the 1970's but wanted one of their own design.
+Calibre 335 was introduced in [[1980]] to replace both the Jaeger-LeCoultre-based [[PP 28-255]] and their earlier [[PP 350|Cal. 350 and 1-350]] movements. It was designed to modern standards, running at 28,800 A/h, and featured a flat balance spring under the non-[[Gyromax]] balance. It did not earn the [[Geneva Seal]], much to the consternation of brand enthusiasts. Cal. 335 proved troublesome in practice, with poor power reserve and less than expected accuracy. It was quickly overhauled and the replacement, [[PP 315|Cal. 315 and 330]] introduced in [[1984]].
+===== Calibre 310 =====
+Cal. 335 was too tall at 3.45 mm to replace the Jaeger-LeCoultre-based Cal. 28-255 in the [[Patek Philippe Nautilus|Nautilus]], so the movement was reworked for the [[1980]] introduction of the [[Patek Philippe Nautilus 3800|mid-sized Nautilus Ref. 3800]]. This new movement was 3.15 mm high but similar in other respects to Cal. 335.
+===== See also =====
+  * [[PP 350]] and [[PP 28-255]], the predecessors
+  * [[PP 315|PP 310 and 330]], the successor
+<WRAP ud ud_mov>
+**Description:**
+  * [[Automatic]] movement
+**Functions:**
+  * Hour/minute/second hands
+  * Date
+**Data:**
+  * 28,800 A/h
+  * Ø 26 mm
+  * Height 3.45 mm or 3.15 mm
+**Production period:**
+  * [[1980]]-[[1984]]
+</WRAP>
+{{tag>Movements Automatic_movements Patek_Philippe_calibres}}